Nut-lock.



Patented lung I7, I902. I

T. C. BURNMAN.

- NUT] LOCK.

(A lication filed a. 20, 1902.

(No Moder.)

WITNESSES.

UNITED STATES PATENT OFFICE.

THOMAS C-OLLINSWORTH BORNMAN, OF SUMMIT, MISSISSIPPL.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 702,770, da tedfl'une 17, 1902. Application filed January ,1902. Serial No. 91,185. (No modelJ To all whom it may concern:-

Be it knownthat I, THOMAS COLLINSWORTH BORNMAN,*3.-GltiZen of the UnitedS tates, and a resident of Summit,- in the county of Pike and State of Mississippi, have invented a new and Improved Nut-Lock, of which the following is a full, clear, and exact description.

This invention relates'to improvements in nut-locks particularly adapted for use on fishplate bolt-nuts, although it may be used for locking bolt-nuts used in other; structures; and the object is to providea nut-lock of sim ple and inexpensive construction ahdiwhich need not be removed-to permit the tightening of a nut. V r

I will describe a nut-lock embodying my invention and then point out the novel features in the appended claim.

Reference is to be had to the accompanying drawings, forminga part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a'front elevation of a nut-lock embodying my invention and showing the same in looking position with a nut securing Fig. 2 isa simi a fish-plate to a railway-rail. lar view, but showing a part moved out by the pressure of the nut while tightening the same; and Fig. 3 is a perspective view'jof the device.

Referring to the drawings, 1 designates a railway-rail, and 2 a fish-plate. The bo1t-3 passes through the fish-plates and therail in the usual manner, and arranged between the nut 4 on the bolt and the fish-plate isa washer 5,which comprises a portion of the nut-lock.

The bottom edge of the washer is-made to form a tube 6, in which a cotter 7 is mov-.

able, said cotter forming the other portion'of the nut-lock.

' without removing the cotter.

driven into place.

boltthecotter is.to be driven in, to engageagainstla side thereof, here shown asat the underside, and then the nut will be prevented-from turning. Should a nut become slightly loose by the wearing of the bolt-head or the like, 'it may be turned to tighten it In other words,

upon applying a wrench to the nut and turning it the corner of the nut, as'indicated in ment of the nut, that when the nut is sufficiently tightened the" cotter may be again By employing ,a cotter consisting of two oppositely-yielding members instead of a bolt or straight bar it is not apt to be lost, and as a whole the nutlock can be made at a very slight expense. When 7 the nut-lock is used in connection with azbolt and nut used inza wooden structure may be turned inward, as indicated at 8, to

form a-prong which may be driven into the wood; 7

Having thus described my invention, 1

I claim as new and desire to secure by Letters of a spring-cotter movable in the tube, the

inner end of the cotter when in position being arranged to be engaged by the nut'to force it outward when the nut is turned for -tightening, substantially as specified.

Intestimony whereof I havesigned my name to-this specification in the presence of two subscribing witnesses.

THOMAS COLLINSWORTII BORNMAN.

Witnesses:

E. M. CAIN, J. 0. FORD. 

